Limit community PR policy to bug fixes

CONTRIBUTING.md

@@ -3,13 +3,12 @@
 Yaak accepts community pull requests for:
 
 - Bug fixes
-- Small-scope improvements directly tied to existing behavior
 
 Pull requests that introduce broad new features, major redesigns, or large refactors are out of scope unless explicitly approved first.
 
 ## Approval for Non-Bugfix Changes
 
-If your PR is not a bug fix or small-scope improvement, include a link to the [feedback item](https://yaak.app/feedback) where @gschier explicitly gave you permission to work on it.
+If your PR is not a bug fix, include a link to the [feedback item](https://yaak.app/feedback) where @gschier explicitly gave you permission to work on it.
 
 ## Development Setup